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TIL one possible origin to the idiom, "shake a leg", meaning to 'get going' or 'hurry it up' came after battles during the Civil War. Stretcher-bearers would violently jostle a leg or arm to elicit a response from victims on the field to determine if he were alive or dead.

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16G7D TIL elephant pregnancies last nearly two years (18-22 months)
VBVeG TIL that in some Eastern European countries, like Romania and Moldova, it was once customary to spit lightly in the faces of children you admired.
W7XJY TIL about sugar alcohols --a component that is now everywhere and cannot be properly digested by humans, hence can cause several gut and digestive issues
R7nE6 Til that dogs can eat raw chicken bones. The issue is with any cooked bone. Cooked bones become dry and brittle which can crack and splinter leading to choking, internal injuries, punctured organs, and, or death. All cooked bones should be disposed of properly and not be given as treats.
d8Yk9 TIL Philly Cheesesteak's origins were two brothers creating lunch for themselves